I don't recommend it until you've resolved any obvious compatibility issues and updated the firmware but Sandforce drives seem to have a lot of problem Windows power management, you could try disabling Link Power Management.Go into the registry-HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\services\\iaStor\\ParametersCreate a key for whatever SATA port the SSD is attached to (ie Port0/Port1/Port2 etc.)

That'll disable all power management for the drive, no guarantees it'll be the solution obviously but it's worked for Sandforce drives often in the past and disabling power management won't harm the drive at all... though it will obviously use more power. Probably benchmark slightly higher too as Windows tends to err on the side on cutting power consumption vs performance with SSD's, but that's not a big deal.Sandforce drives don't have the best reputation though, and OCZ is... not especially well regarded so cover and troubleshooting steps listed on their site/forum first and update the firmware. There is a good chance your drive was manufactured months before you got it, and I know the Agility 3 has seen quite a few firmware updates so it may well be outdated.

One other thing: are you "sleeping" the computer between usage sessions? Some SSDs, with some combinations of hardware, don't seem to like that very much. I upgraded an older Acer laptop to a Samsung 830 and so far it works fine in normal use and in hibernation, but if I sleep the unit, it seems to wake up with the same positive outlook and sunny disposition as I do. Which is to say, none at all.